Steam-boiler.



PATEN TED NOV H. V. BRADY. STEAM BOILER. APPLIOATION nun MAYB, 1907.

3 SHEETS-SHEET 1.

Z flmac attorney 1n: Nan/us FETERJ co WASHINGYUN, a. c.

H. V. BRADY.

STEAM BOILER. APPLICATION 1mm) my a, 1901.

s sums-51mm 2.

PATBNTED NOV. 26. 1907.

PATENTED NOV. 26. 1907.

H. V. BRADY. STEAM BOILER.

APPLICATION IILED my 9,

3 SHEETS-SHEET 3.

' witnesses attoemu,

UNITED STATES HARRY VINCENT BRADY, OF AMHERST, NOVA SCOTIA, CANADA.

STEAM-BOILER.

Specification of Letters Patent.

Patented Nov. 26, 1907.

Application filed May 9, 1 907. Serial No. 372.811.

T 0 all whom it may concern:

.in the Dominion of Canada, have invented new and useful Improvements in Steam- Boilers, of which the following is a specification.

This invention relates to horizontal firetube boilers, and more particularly to improvements in the locomotive type of boiler for marine or portable use, and it consists in a furnace and barrel connection of novel construction and in certain novel combinations of parts hereinafter described and claimed.

The leading object of the invention is to provide for making the furnace shell ofa boiler having any required o'l'l'set, as well as the barrel of the same, round in cross section.

Other objects are set forth in the general description which follows:

Three sheets of drawings accompany this specification as parts thereof.

Figure 1 represents the improved boiler in vertical. longitudinal medial section; Fig. 2 represents a fragmentary cross-section on the line A-B, Fig. 1, showing the furnace head;

Fig. 3 is a view of the shell head with added dotted lines indicating the arrangement of stay bolts for supporting the dome; Fig. 4 is a face view of the furnace and barrel connec tion segregated; Fig. 5 is an edge view projected from Fig. 1; Fig. 6- is a view of the same connection showing its other face Fig. 7 is a front. view of the boiler as shown in Fig. 1 andFig. 8 is a sectional detail showing a water front as an alternative of the fire-brick front shown in Fig. 1.

Like reference characters refer to like parts in all the figures.

The improved boiler includes a furnace shell, a, round in cross section, a cylindrical barrel, 1), and a connection, a, by which the peculiar offset between such furnace shell and barrel is strongly formed, and the manufacture of the improved boiler is rendered practicable. Said connection 0 is segregated in Figs. 4, 5 and 6, which see. The same includes circular lap-joint rims, 1 and 2, fitted respectively to the adjoining ends of the furnace shell 0, and the barrel 1), and lune-shaped offset portions, 3 and 4, integral with the re spective rims. The whole may be cast in one piece of suitable metal but I prefer to forge it in two partsunited by lap joints, 5

and 6, secured by rivets and welding, either or both, in an approved way.

The furnace shell a contains a round firel)OX, d, conveniently concentric with the shell, and preferably corrugated circumferentially as shown in Fig. 1. The circular furnace front may be either of the lire-brick construction shown in Figs. 1 and 7 at e, or of the water-front construction represented at c in F 8.

The fire and ash doors, represented respectively at 7 and S, the grate, 9, bridge, 10, and ash-pit damper, 11, or their respective equivalents, may be of any known oi improved construction.

The circular furnace head, 12, Figs. 1 and 2, forming part of the lire-box (Z, is pierced with the requisite lire-tube holes, f Fig. 2, for the tubes, f, Fig. ,1, in its upper portion, and beneath the same is provided with holes, g, Fig. 2, for short stays, g and 9 Fig. 1, by which the fireboX d and the connection a are strongly united. One or more upper stays g interact with stay pieces 9, Fig. 1, securely attached within the front end of the shell of the barrel'b. The connection 0 is also united with the front end of the barrel 1) by oblique stay bolts, 7L, Fig. 1; being provided with holes, /t, Fig. 2, in its upper ol'lset portion, 4, to accomn'iodate them.

The space above the tube holes, f, Fig. 3, in the shell head 13, segregated in Fig. 3, accommodates holes, 'i, for an ample numher of oblique stay bolts, 01 and i, Fig. 1, by which the top of the barrel shell is effectively supported in the vicinity of a superposed drum,

The connection 0 and the shell head 13 are provided respectively with suitably capped hand holes, Is and Z, affording access to the respectively.

The top of the barrel 1) is further provided with a suitably capped hand hole, 14, Fig. 1, and with flanges, 15, '16 and 17, Fig. 1, for the uptake, the safety valve and other attachments; and the furnace a and barrel 1) are both provided at bottom with blow offs, 18 and 19, Fig. 1.

, The smoke box, m, Fig. 1, together with the dome j and their accessories, and other necessary parts of the boiler which are not included in the claims hereto appended, may be of any known or improved construction, forming no part of the present invention.

The height of the longitudinal axis of the spaces beneath the lire-box (Z and the tubes f barrel 1) above that of'the furnace a maybe greater or less than is represented in the drawings, vasmay be required; the shape of the round fire-box in longitudinal section may vary, and other like modifications will suggest themselves to those skilled in the art.

' I claim as my invention 1. In a steam boiler, a furnace and barrel connection having lap-joint rims projecting on its front and rear sides respectively and offset portions integral with the respective rims.

2. In a steam boiler, a furnace and barrel connection having circular lap-joint rims projecting on its front and rear sides respectively-and lune-shaped offset portions integral with the respective rims. I i

3. In a steam boiler, the combination of a furnace shell round in cross section, a barrel the longitudinal axis of which is higher than that of the furnace, and a connection comprising rims fitted to the adjoining ends of said furnace and said barrel respectively and offset ortions at top and bottom.

4. n a steam boiler, the combination of a furnace shell round in cross section, a cylindrical barrel the longitudinal axis of which is higher than that of the furnace, and a connection comprising circular rims fitted to the adjoining ends of said furnace and said barrel respectively and lune-shaped offset portions at top and bottom.

5. In a steam boiler, the combination of a furnace shell round in cross section, a cylindrical barrel the longitudinal axis of which is higher than that of the furnace, an offset connection having rims fitted to the adjoining ends of said furnace shell and the barrel shell, and a round fire-box supported concentrically within said furnace shell.

6. In a steam boiler, the combination of a furnace shell round in cross section, a cylin drical barrel the longitudinal axis of which is higher than that of the furnace, an offset connection having rims fitted to the adjoining ends of said furnace shell and the barrel shell, a round fire-box supported concentrically within said furnace shell and constructed'with the furnace head, a shell head parallel with said furnace head, and fire-tubes within the barrel extending through said heads. v

7. In a steam boiler, the combination of a furnace shell round in cross section, a cylindrical barrel the longitudinal axis of which is higher than that of the furnace, an offset connection having rims fitted to the adjoining 'ends of said furnace shell and the barrel shell, a round fire-box supported concentrically within said furnace shell and constructed with the furnace head, a shell headparallel with said furnace head, and horizontal fire-tubes Within the lowerportion of .the barrel extending through said heads.

8. In a steam boiler, the combination of a furnace shell round in cross section, a cylindrical barrel shell the longitudinal axis of box within said furnace shell constructed with the furnace head, and stay bolts uniting said head at bottom with the corresponding offset portion of said'connection- I 9. In a steam boiler, the combination of a furnace shell round in cross section, a cylin.

drical barrel shell the longitudinal .axis of which is higher than that of the furnace, a-

connection between said shells having rims fitted to their adjoining ends respectively and offset portions located respectively belowthe barrel and above the furnace, a stay piece attached within the front end of the barrel, and stay bolts connecting'said head with said stay piece. Y

10.- Ina steam boiler,- the combination of a furnace shell round in cross section, a cylindrical barrel shell the longitudinal axis of which is higher than that of the furnace, a connection between said shells having rims fitted to their adjoining ends respectively and ofiset portions located res ectively below the barrel and above the irnace, and

stay bolts uniting the upper offset portion of HARRY VINCENT BRADY.

Witnesses: V i

HENRY McCLEAvE, W. B. CALH UN. 

